Dental instrument



. Sept. 11, 1928.

G. w. TODD DENTAL INSTRUMENT Filed April 16, 192'! Fig. 5. 3

' G.W. Todd lbiym f 65 2*:

Patented Sept. 11,1928.

UNITED STATES rarear orifice.

GEORGE w. TODD, or OMAHA, NnBnAsKA, iassreNo a r0 n rnNA TODD, or OMAHA,

' NEBRASKA.

DENTAL INSTRUMENT.

Application' filed A ril is, 1927; Serial-N0. 184,288,

This invention relates to an instrument for use of dentists in the extraction of teeth.

In this work it frequently happens that, on'

account of their condition the crowns become crushed or separated from the root or roots, and'in such instances removal of the roots is often a difficult matter and results in loss of time of the patient and operator.

Also it is well known in dentistry that if the crown of" the tooth becomes separated from the roots, it is often desirable to separate the roots to facilitate removal. Also that, in some instances, in the removal of the roots, they are so firmly embedded, that the jaw is injured or fractured in effecting their removal.

One of the objects of the invention is to provide an instrument which may have a rocking movement by the hand of an operator in readily forming recesses at the opposed sides of a toothroot.

Another object is to provide an instrument of the class described by use of which'a groove may be readily formed surrounding the root or roots of a tooth.

Still another object is to provide an'instrument which may have a rocking movement for quickly separating the roots of a tooth when required.

The invention includes an instrument of free and sents a novel and useful construction, combination and arrangement of parts as'described" herein and claimed and as illustrated in the accompanying drawing, it being understood that changes may be made in form, size, pro portion and minor details without departing from the spirit of the invention or sacrificing any of its advantages, said changes being determined by the scope of the invention as claimed.

In the drawing Fig. 1 is a plan view of a dental instrument, being one embodiment of the invention. Fig. 2 is an enlarged detail showing a part of one of the handles illustrated in Fig. 1. Fig. 3 is a view taken at surright angles to the view shown in Fig. 2. Fig. i 18 a v ew partly in section showing the roots of a tooth and a part of a jaw. Fig. 5

I is a view showing a modified form'of the invention. Fig. 6 is asectional view to illustrate recessesor grooves formed in the jaw'at the sides of a tooth.

Referring now to the drawing for a more particular description, numerals 6 and? in dicate a pair of handles pivotally connected adjacent to one of their ends as indicated at 8, each handle preferably having a bowshaped part 9 adjacent to the pivot 8, the

, handle 6 being provided with a terminal supporting element 10 outwardly of its bowshaped part, and the handle 7 being provided with a serrated bladell. V i

The general appearance of the instrumei'it thus described is similar tovarious gripping instruments used by dentists.

'lhe bow-shaped parts 9 are disposed opposite to each other and the serrated blade 11 is disposedv opposite to the support 10, and a movement of the handles toward each other will cause a like movement of elements 9, l0 and 11. I

'The object in view in providing the'Opposed bow-shaped parts 9 is to permit a. view of the teeth and parts adjacent thereto while operating, this being of advantage, more particularly while operating upon teeth or roots of teetlrin the lower jaw.

The use of't'he device will'be appreciated by all persons'familiar with dental work.

Removal. of roots of teeth has generally been a diflicult' matter in instances where they areembedded in the jaws since no suitable contact with the roots can be m'adr The blade 11 hasa curved cutting edge clearly shownin the drawing, consisting of aplurality ofteeth a of approximately V- shape. v I

' While I donot wish to limit myself to the shape of the teeth of the blade, the saw tooth shape, or shape used for ordinary saws preferred. 7

Since the curvature ofthe blade is longitil) lUu

tudinal, the instrument may havea rocking movement in the hand of an operator to cause the blade'to incise eitherbone, hard tissue or the gums as may be required.

In instances where the crown or neck of a tooth has been broken or separated from the root or roots of a tooth and the broken lilh end of the root is disposed in the jaw bone, the instrument as described may be used and may have a rocking movement to form a groove 6, said groove permitting a suitable contact for'thejaws of a gripping instrument not shown) for removing the root or roots d.

Another advantage in the use of the here- .in described instrument is that the edges of the gum 6, adjacent to the roots d will be trimmed ready for healing after the roots have been removed. i

The advantage in providing a removable mounting for the blade is to permitsubstitution of a new or different blade for one in present use[ However, the blade may be.

constructed integral with a handle if desired.

\Vhile I have described a supporting-element 10, it will be understood that is a terminal part of a handle disposed opposite to the blade 11.

In operation the element 10 may engage a side of a root d as a guide or support while the serrated blade is forming a recess or groove f inthe bone, at the side of a root.

It will be understood that all incisions are caused by a rocking movement of the imple- V ment, the result being that operation will be practically painless to the pat ent and may be quickly performed. Also, by its use, the roots of a tooth may be readily separated. without causing appreciable pain.

While I have shown anddescribed bowshaped parts 9, this being the preferred construction, I do not wish to be understood as limiting myself in this respect. Also the blade may be provided with notches o'r teeth of any suitable shape.

The modified form of the invention shown in Fig. 5 of the drawing consists of a single handle 7 provided at one of its ends with a blade 11' having a longitudinally curved edge provided with teeth a ment may be used in forming recesses or grooves '11 the same as described, the instru- V ment havinga rocking movement for these with the tooth, as Well as in instances Where there has been an abnormal growth of the root or roots of a tooth to cause projections or enlargements of a root in the bone, for in all instances, by use of the instrument,

This instruthe tooth may be separated from the bone,

and without liability of breaking the root or roots during operation. i

It is proper to state that theV shaped teeth may be of attenuated form with edges of knife-like sharpness, this construction for the teeth being of advantage in certain operations, but I do not wish to limit myself to this feature. Also, as shown in Fig. 1 of the drawing, the blade at the end of one handle projects somewhat beyond the end of the other handle, this being obviously of advantage to permit the blade 11 to move in an arc outwardly of the support 10, during the rocking movements of the instrument. t i

r I claim as my invention 1. Ina dental instrument, a pair of pivotally connected handles providing a jaw and a second jaw at their distal ends, the first named jaw having a concaved inner surface and a convergent terminal, a sawblade mounted on the second jaw, the parts beinglof such proportion that said convergentterminal will normally be disposed in a plane between the ends of the saw-blade.

2. In a dental instrument, a pair of pivotally connected handles providing a jaw and a second jaw at their distal ends, the

first named jaw having a concaved inner surface, a saw-blade mounted on the second jaw, the parts being of such proportion that the outer end of the first named jaw will normally be disposed in a-plane between the ends of the saw-blade.

3. In a dental instrument, a pair of pivotally connected handles roviding a jaw and second jaw at their distal ends, a rectilinear blade mounted on the second jaw having an outwardly curved row. of teeth, the parts being so proportioned that the outer end of the first named jaw is normally disposed in a plane between the ends of said row of teeth.

4. In a dental instrument, a pair of pivotally connected handles providing a jaw and a second jaw at their distal ends, said first named jaw havinga concaved inner surface and a convergent terminal, a rectilinear blade mounted on the second jaw provided with an outwardly curved row of teeth, the proportion of parts being such that the convergent terminalof the first named jaw is normally disposed in a plane between the ends of said row of teeth.

signature.

GEORGE W. TODD. 

